Computational Modeling of Neutron Shielding Using Deterministic Methods

Detalhes bibliográficos
Autor(a) principal: Muniz, Tarcila Oliveira Matos
Data de Publicação: 2021
Outros Autores: Oliveira, Francisco Bruno Souza
Tipo de documento: Artigo
Idioma: por
Título da fonte: Vetor (Online)
Texto Completo: https://periodicos.furg.br/vetor/article/view/12877
Resumo: In this paper, the so-called source-fixed problem (neutron shielding) in a non-multiplicative medium has been studied. Thus, neutron source shielding was computationally simulated using deterministic numerical methods to estimate the scalar and angular neutron fluxes in a one-dimensional domain. The linearized Boltzmann transport equation for neutral particles was employed in the modeling of the problems studied. In the numerical solution of the Boltzmann equation, certain approximations were considered and consolidated numerical methods were employed to generate accurate solutions. The Diamond Difference (DD), Step and Step Characteristic methods were used in the model problems addressed. The shielding configuration consisted of three materials, with the assembly sequence and material type varying as a function of the material-neutron interaction. Model problems were simulated and examined in order to identify efficient shielding for the emerging neutron flux.
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spelling Computational Modeling of Neutron Shielding Using Deterministic MethodsModelagem Computacional de uma Blindagem de Nêutrons Utilizando Métodos DeterminísticosBlindagem de nêutronsEquação de transporte de nêutronsModelagem Computacional DeterminísticaNeutron shieldingNeutron transport equationDeterministic Computational ModelingIn this paper, the so-called source-fixed problem (neutron shielding) in a non-multiplicative medium has been studied. Thus, neutron source shielding was computationally simulated using deterministic numerical methods to estimate the scalar and angular neutron fluxes in a one-dimensional domain. The linearized Boltzmann transport equation for neutral particles was employed in the modeling of the problems studied. In the numerical solution of the Boltzmann equation, certain approximations were considered and consolidated numerical methods were employed to generate accurate solutions. The Diamond Difference (DD), Step and Step Characteristic methods were used in the model problems addressed. The shielding configuration consisted of three materials, with the assembly sequence and material type varying as a function of the material-neutron interaction. Model problems were simulated and examined in order to identify efficient shielding for the emerging neutron flux.Neste artigo, o problema denominado de fonte-fixa (blindagem de nêutrons) em meio não multiplicativo foi estudado. Assim, foi simulada computacionalmente a blindagem da fonte de nêutrons utilizando métodos numéricos determinísticos para estimar os fluxos escalares e angulares de nêutrons em um domínio unidimensional. A equação de transporte linearizada de Boltzmann para partículas neutras foi empregada na modelagem dos problemas estudados. Na resolução numérica da equação de Boltzmann, foram consideradas certas aproximações e empregados métodos numéricos consolidados para gerar soluções precisas. Os métodos numéricos Diamond Difference (DD), Step (ou Degrau) e Step Characteristic (Degrau Característico) foram utilizados nos problemas-modelo abordados. A configuração das blindagens era constituída de três materiais, variando-se a sequência da montagem e o tipo de material em função da interação material-nêutron. Foram simulados e analisados problemas-modelo de modo a identificar blindagens eficientes para o fluxo emergente de nêutrons.Universidade Federal do Rio Grande2021-04-22info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.furg.br/vetor/article/view/1287710.14295/vetor.v30i1.12877VETOR - Journal of Exact Sciences and Engineering; Vol. 30 No. 1 (2020); 15-27VETOR - Revista de Ciências Exatas e Engenharias; v. 30 n. 1 (2020); 15-272358-34520102-7352reponame:Vetor (Online)instname:Universidade Federal do Rio Grande (FURG)instacron:FURGporhttps://periodicos.furg.br/vetor/article/view/12877/8662Copyright (c) 2021 VETOR - Revista de Ciências Exatas e Engenhariasinfo:eu-repo/semantics/openAccessMuniz, Tarcila Oliveira MatosOliveira, Francisco Bruno Souza2021-08-05T21:46:16Zoai:periodicos.furg.br:article/12877Revistahttps://periodicos.furg.br/vetorPUBhttps://periodicos.furg.br/vetor/oaigmplatt@furg.br2358-34520102-7352opendoar:2021-08-05T21:46:16Vetor (Online) - Universidade Federal do Rio Grande (FURG)false
dc.title.none.fl_str_mv Computational Modeling of Neutron Shielding Using Deterministic Methods
Modelagem Computacional de uma Blindagem de Nêutrons Utilizando Métodos Determinísticos
title Computational Modeling of Neutron Shielding Using Deterministic Methods
spellingShingle Computational Modeling of Neutron Shielding Using Deterministic Methods
Muniz, Tarcila Oliveira Matos
Blindagem de nêutrons
Equação de transporte de nêutrons
Modelagem Computacional Determinística
Neutron shielding
Neutron transport equation
Deterministic Computational Modeling
title_short Computational Modeling of Neutron Shielding Using Deterministic Methods
title_full Computational Modeling of Neutron Shielding Using Deterministic Methods
title_fullStr Computational Modeling of Neutron Shielding Using Deterministic Methods
title_full_unstemmed Computational Modeling of Neutron Shielding Using Deterministic Methods
title_sort Computational Modeling of Neutron Shielding Using Deterministic Methods
author Muniz, Tarcila Oliveira Matos
author_facet Muniz, Tarcila Oliveira Matos
Oliveira, Francisco Bruno Souza
author_role author
author2 Oliveira, Francisco Bruno Souza
author2_role author
dc.contributor.author.fl_str_mv Muniz, Tarcila Oliveira Matos
Oliveira, Francisco Bruno Souza
dc.subject.por.fl_str_mv Blindagem de nêutrons
Equação de transporte de nêutrons
Modelagem Computacional Determinística
Neutron shielding
Neutron transport equation
Deterministic Computational Modeling
topic Blindagem de nêutrons
Equação de transporte de nêutrons
Modelagem Computacional Determinística
Neutron shielding
Neutron transport equation
Deterministic Computational Modeling
description In this paper, the so-called source-fixed problem (neutron shielding) in a non-multiplicative medium has been studied. Thus, neutron source shielding was computationally simulated using deterministic numerical methods to estimate the scalar and angular neutron fluxes in a one-dimensional domain. The linearized Boltzmann transport equation for neutral particles was employed in the modeling of the problems studied. In the numerical solution of the Boltzmann equation, certain approximations were considered and consolidated numerical methods were employed to generate accurate solutions. The Diamond Difference (DD), Step and Step Characteristic methods were used in the model problems addressed. The shielding configuration consisted of three materials, with the assembly sequence and material type varying as a function of the material-neutron interaction. Model problems were simulated and examined in order to identify efficient shielding for the emerging neutron flux.
publishDate 2021
dc.date.none.fl_str_mv 2021-04-22
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://periodicos.furg.br/vetor/article/view/12877
10.14295/vetor.v30i1.12877
url https://periodicos.furg.br/vetor/article/view/12877
identifier_str_mv 10.14295/vetor.v30i1.12877
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://periodicos.furg.br/vetor/article/view/12877/8662
dc.rights.driver.fl_str_mv Copyright (c) 2021 VETOR - Revista de Ciências Exatas e Engenharias
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2021 VETOR - Revista de Ciências Exatas e Engenharias
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal do Rio Grande
publisher.none.fl_str_mv Universidade Federal do Rio Grande
dc.source.none.fl_str_mv VETOR - Journal of Exact Sciences and Engineering; Vol. 30 No. 1 (2020); 15-27
VETOR - Revista de Ciências Exatas e Engenharias; v. 30 n. 1 (2020); 15-27
2358-3452
0102-7352
reponame:Vetor (Online)
instname:Universidade Federal do Rio Grande (FURG)
instacron:FURG
instname_str Universidade Federal do Rio Grande (FURG)
instacron_str FURG
institution FURG
reponame_str Vetor (Online)
collection Vetor (Online)
repository.name.fl_str_mv Vetor (Online) - Universidade Federal do Rio Grande (FURG)
repository.mail.fl_str_mv gmplatt@furg.br
_version_ 1797041761772634112

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